An inquest into the death of a teenager at Ipswich, west of Brisbane, while handcuffed in police custody, has heard final submissions from lawyers.

Andrew John Bornen, 16, was killed when he was hit by a car at Brassall in Ipswich in February 2009, while handcuffed and lying on the road.

Queensland coroner Michael Barnes is considering the conduct of the officers at the scene, the Queensland Police Service's use of force policies, and the manner in which the car was being driven before the accident.

The hearing has been adjourned and Coroner Barnes is expected to hand down his decision later this afternoon.

Yesterday, the inquest heard yesterday conflicting evidence about the speed of the car which ran over him at Ipswich, west of Brisbane.

Witnesses told the inquest earlier this week that two police officers ordered Mr Bornen to get down on the road after reports he had been seen with a weapon.

The driver of the car said she did not realise Mr Bornen was there until it was too late.

Arresting officer Sergeant Anthony Brett was a senior constable at the time.

He has claimed privilege, meaning his testimony cannot be used against him in criminal proceedings.

He said he feared for his life while arresting Mr Bornen because the teen was armed with a baseball bat and his demeanor was threatening.

Sergeant Brett said he did not consider it was a risk that Mr Bornen was lying in the road because traffic was "light".

He said he had run as hard as he could to stop the car but the driver did not take evasive action.